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Linux is an open source operating system, which is used in laptops or computers. To run Linux, we should know about the commands of Linux operating system.

What is Linux command?

Linux command is related to Linux operating system. All basic and advanced level tasks are done on Linux operating system through Linux command.

For your information, we would like to tell you that a command line interface is required to interact with the terminal system, which is similar to the command prompt in Windows operating system. Whatever commands are there in Linux, they are case sensitive.

Linux Commands

Below we have given you information about total 50 Linux commands.

1. mail Command
Mail command is used to send email from command line.

2. ping Command
Ping command is used to check the connection between two nodes.

3. host Command
Host command is used to display the IP address of the given domain name. It performs DNS lookup for DNS query.

4. ls Command
The above command is used to display the list of contents of a directory.

5. cd Command
The cd command is used to change the directory that is currently on the screen.

6. touch Command
The touch command is used to create an empty file. If we want, after creating one empty file, we can create multiple empty files by executing it.

7. cat Command
The cat command is a multipurpose utility in Linux system. It can be used to create a file or to show the contents of the file.

8. rm Command
If there is a need to remove a file, then the rm command is used.

9. cp Command
The cp command is used to copy a file or a directory.

10. mv Command
The above command can be used to move a file from one location to another or to move a directory.

11. rename Command
If you want to change the name of a file, then you use the rename command. The rename command proves to be very helpful in renaming a large group of files.

12. head Command
The head command is used to show the contents of a file. This command shows you the first 10 lines of the file.

13. tail Command
This command is similar to the head command. The difference between these two commands is that the above command shows the last 10 lines of the file content and the head command shows the first 10 lines of the file content. The tail command proves to be very helpful in reading error messages.

14. tac Command
If you want to see a file content in reverse order, then you need to use the above command. This command works to show the file content from bottom to top.

15. more command
This command is similar to the CAT command because it is used to show the file content in the same way as the CAT command shows.

16. less Command
This command is similar to the more command. It includes some extra features such as adjustment in width and height of the terminal.

17. su Command
The above command provides administrative access to another user. In other words, it gives permission to the Linux cell to access another user.

18. id Command
The id command is used to show user ID and group ID.

19. useradd Command
The useradd command is used to remove a user from the Linux server or to add a user.

20. passwd Command
The passwd command is used to change the user's password or to create a user's password.

21. groupadd Command
The above command is used to create a new user group.

22. cat Command
The cat command can also be used as a filter. Pipe is available in it for filtering.

23. cut Command
The cut command is used to select the column of a specific file.

24. grep Command
The above command is used the most in Linux system, which is a filter. The full name of the above command is Global Regular Expression Print. It proves to be very helpful in searching the content of the file.

25. comm Command
The above command is used to compare two files. By default, the above command displays 3 columns. In this, the first column contains non-matching items, the second column contains non-matching items of the second file and the third column contains the items of both the files.         

26. sed command
The sed command is also known as a stream editor. It is used to edit files with the help of regular expressions. However, it does not edit permanent files. The file that is edited through this is only visible on the display and does not have any effect on the actual file.

27. tee command
The tee command puts standard output in the file and also writes it to the file.

28. tr Command
The above command is used to translate the file content. Such as lowercase to uppercase.

29. uniq Command
This command is used to form a shortlist, where every word appears only once.

30. wc Command
The wc command is used to count how many lines are present in a file, how many words are present.

31. od Command
The od command is used to display the contents of the file in characters like hexadecimal, octal.

32. sort Command
The short command is used to sort the file in alphabetical order.

33. gzip Command
The above command is used to truncate the file size. It is a compressing tool.

34. gunzip Command
The gunzip command is used to decompress the file. You can also consider it as the reverse operation of the gzip command.

35. find Command
The find command is used to search for a specific file in a directory. This command supports different options. Such as searching for a file by name or searching for a file by size or by date.

36. locate Command
The locate command is used to search for a file by its name. It is somewhat similar to the find command. The locate command searches for a file in the database, while the find command searches for a file in the file system.

37. date Command
The date command is used to display date, time, time zone and other things.

38. cal Command
The above command is used to display the calendar of the current month. On using this command, you see the current month with the highlighted date.

39. sleep Command
The above command is used to hold the terminal for a specified amount of time.

40. time Command
The time command is used to display the time so that the command can be executed.

41. zcat Command
The above command is used to show the file which has been compressed.

42. df Command
The df command is used to show the disk space used in the file system. It shows the output under the number of blocks used. Apart from this, it also shows the available blocks and mounted directories.

43. mount Command
The mount command is used to connect the external device file system to the system's file system.

44. exit Command
The exit command is used to exit the cell that is currently present.

45. clear Command
The Linux clear command is used to clear the terminal screen.

46. ip Command
The Linux ip command is an updated version of the ipconfig command. The Linux ip command is used to assign IP addresses. Apart from this, the ip command can also be used to intialize the interface and disable the interface.

47. ssh Command
The Linux SSH command is used to create a remote connection via the SSL protocol.

48. pwd Command
This Linux command is used to show the location of the directory that is currently being worked on.

49. mkdir Command
If you want to create a new directory in any directory, then you should use the above command.

50. rmdir Command
If we need to delete a directory in Linux, then we have to use the above command.

Features of Linux

Being portable, the Linux operating system has the capacity to work on different hardware simultaneously.
The Linux operating system is a multi-user operating system.
It is capable of accessing different users, memory, random access memory and applications at one time.
You can run different programs simultaneously in it, because it is also multiprogramming and it is free.